The riding in/around Blanco is wonderful. Lots of rural roads with minimal traffic. Chip seal is prevalent but nothing major. Hills will be a major factor, and the scenery is beautiful.
I would suggest doing a ride to Luckenbach and back. It's a (very) small town, with a somewhat legendary status in Texas. It's worth your while to check it out, if only for the novelty.
This website -
CycleTexas.com - Cycling Routes - lists a lot of good routes that begin/end in Fredericksburg, which is about 30 miles northwest of Blanco. Some of the routes go toward Blanco and you may find some good roads to connect to from here. Have fun!